Pixy can detect an object that is miles away as long as the object is large enough. Described another way – Pixy will detect an object that's as small as 4×1 pixels in the image. This means it can detect a ping-pong ball sized object at 10 feet (a 40mm object at 3 meters), assuming a 75 degree field-of-view lens (the lens Pixy ships with). A lens with a longer focal length can greatly extend the detection distance, but with a narrower field of view.